It is a great book for those students who are preparing for competetive exams.I studied it very carefully and found that it contains chapters from basic to very advance .Many chapters are out of syllabus like nano particles in the end of the book but as I am a science lover I also read it once .It is a awesome book but on the another end some chapter are very difficult to understand and are of b.sc level, i skipped them because I have no time for them to study although they are not in syllabus .Many times I loose my temper and give up on this book but read it forcefully but now I am enjoying reading it.THANK YOU .